Enhanced removal of emerging pharmaceutical contaminant ciprofloxacin and pathogen inactivation using morphologically tuned MgO nanostructures

• Published in: Journal of environmental chemical engineering 2020-10, Vol.8 (5), p.104256, Article 104256
• Main Authors: Sivaselvam, S., Premasudha, P., Viswanathan, C., Ponpandian, N.
• Format: Article
• Language: English
• Subjects: Antibacterial mechanism; Ciprofloxacin removal; Microwave assisted synthesis; Pathogen inactivation; ROS; Shape-dependent activity
• ISSN: 2213-3437; 2213-3437
• DOI: 10.1016/j.jece.2020.104256

[Display omitted] •Tuning the morphology and functional properties of MgO nanostructures with surfactant.•Two different morphologies of cube and sphere with surface area of 94.28 and 108.22 m2 g−1.•Highest ciprofloxacin adsorption of 476.19 and 528.23 mg g−1 for cube and sphere.•It follows the Longmuir isotherm and pseudo second order kinetics. The existence of antibiotics like ciprofloxacin in wastewater is a severe threat to human health and it also can leads to the development of antibiotic-resistant pathogens. In the present study, two different morphologies of MgO nanostructures are prepared by using a simple microwave-assisted process to adsorb Ciprofloxacin (CIP) from aqueous solution. The physicochemical properties of the prepared MgO nanostructures are investigated by using X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Brunauer-Emmett-Teller (BET) surface analysis and field emission scanning electron microscopy (FESEM) with EDS. The cube and spherical shaped MgO nanostructures demonstrate good adsorption property with the maximum adsorption capacity (Qₒ) of 476 and 528 mg g−1 for CIP. The experimental data have been fitted well with the pseudo second order kinetic model and Langmuir isotherm. The prepared MgO nanostructures show potent antibacterial activity for the gram-positive and gram-negative bacteria. The increased oxidative stress and damaged cell membrane on interaction with MgO nanoparticle ultimately contribute to bacterial death. The prepared MgO nanostructures show high adsorption and antimicrobial activity, which could promise in controlling the threat to humans posed by antibiotics and the development of drug-resistant bacteria in aqueous solution.